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Lighthouse Mobile

· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
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Detailed Report

Audit breakdown by category with detailed findings.

20

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

RequestCache TTLTransfer Size
/api/v1/loops/stellar/prod/118033-visit-canberra-loop.mp4...300.0 s7.6 MiB
/api/v1/loops/stellar/prod/118733-dana-national-zoo-baby-...300.0 s2.6 MiB
registry.api.cnn.io/bundles/fave/ui-31f91f80/ui600.0 s2.3 MiB
/api/v1/loops/stellar/prod/flooding-in-wisconsinloop-hori...300.0 s1.9 MiB
/api/v1/images/stellar/prod/cnn-headlines-international-p...300.0 s1.1 MiB
registry.api.cnn.io/bundles/fave/boltPlayer-928190fd/boltPlayer600.0 s624.8 KiB
registry.api.cnn.io/bundles/fave/vendor-a5827f1f/vendor600.0 s339.5 KiB
z.cdp-dev.cnn.com/zion-web-client/3.0/zion-web-client.min.js0.0 ms269.4 KiB
/api/v1/images/stellar/prod/118867-ahmedeldin-vrtc-thumb-...300.0 s226.9 KiB
/api/v1/images/stellar/prod/118857-popeleopresser-thumbna...300.0 s197.2 KiB
/media/sites/js/bundles/cnn-edition-adfuel-e30d4ed1f85bf5...7200.0 s215.4 KiB
/api/v1/images/stellar/prod/118860-notredametrump-00-00-1...300.0 s157.6 KiB
/api/v1/images/stellar/prod/gettyimages-2267440730.jpg?c=...300.0 s139.1 KiB
/api/v1/images/stellar/prod/lisa-kristine-com-12.jpg?c=16...300.0 s137.4 KiB
/api/v1/images/stellar/prod/2026-04-15t203835z-1896132887...300.0 s137.2 KiB
/6adbc4e9-beda-4b9e-9117-43ec3a80e1d0-web.js900.0 s134.2 KiB
/api/v1/images/stellar/prod/c-gettyimages-2270756394.jpg?...300.0 s118.4 KiB
cdn.optimizely.com/public/125375509/s/landingprod.js600.0 s122.6 KiB
/api/v1/images/stellar/prod/gettyimages-2269936762.jpg?c=...300.0 s116.3 KiB
/api/v1/images/stellar/prod/gettyimages-51246880.jpg?c=16...300.0 s113.4 KiB
registry.api.cnn.io/bundles/fave/latest-4.x/js600.0 s116.6 KiB
/api/v1/images/stellar/prod/310.jpg?c=16x9&q=h_540,w_960,...300.0 s109.9 KiB
/api/v1/images/stellar/prod/gettyimages-143133452.jpg?c=1...300.0 s105.5 KiB
/api/v1/images/stellar/prod/c-ap26103551234934.jpg?c=16x9...300.0 s104.9 KiB
/api/v1/images/stellar/prod/2026-04-16t065631z-253594607-...300.0 s104.4 KiB
/api/v1/images/stellar/prod/gettyimages-2173108322.jpg?c=...300.0 s98.3 KiB
/api/v1/images/stellar/prod/ap26095642336676.jpg?c=16x9&q...300.0 s94.3 KiB
cdn.tinypass.com/api/tinypass.min.js14400.0 s132.3 KiB
edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otBannerSdk.js7200.0 s110.5 KiB
/api/v1/images/stellar/prod/sipa-01219076-000049.jpg?c=16...300.0 s84.3 KiB
/api/v1/images/stellar/prod/img-0172-crop.jpg?c=1x1&q=h_5...300.0 s80.3 KiB
c.amazon-adsystem.com/aax2/apstag.js3600.0 s90.8 KiB
lightning.cnn.com/launch/7be62238e4c3/97fa00444124/launch-2878c87af5e3.min.js0.0 ms69.9 KiB
registry.api.cnn.io/bundles/fave/boltInstance-ea4aefab/boltInstance600.0 s75.6 KiB
cadmus.script.ac/d2uap9jskdzp2/script.js600.0 s73.8 KiB
/api/v1/images/stellar/prod/gettyimages-2252173480.jpg?c=...300.0 s69.3 KiB
client.aps.amazon-adsystem.com/publisher.js3600.0 s82.5 KiB
/api/v1/images/stellar/prod/gettyimages-2271560663.jpg?c=...300.0 s66.8 KiB
/api/v1/images/stellar/prod/new-atlantic-cover-1024x576.j...300.0 s65.5 KiB
/api/v1/images/stellar/prod/c-gettyimages-2224032413.jpg?...300.0 s61.6 KiB
/pagead/managed/js/activeview/current/ufs_web_display.js3600.0 s73.1 KiB
/api/v1/images/stellar/prod/market39.jpg?c=1x1&q=h_512,w_...300.0 s54.9 KiB
/api/v1/images/stellar/prod/exorbitant-stage.jpeg?c=1x1&q...300.0 s53.6 KiB
/api/v1/images/stellar/prod/clarke-1.jpg?c=1x1&q=h_512,w_...300.0 s52.8 KiB
/api/v1/images/stellar/prod/gettyimages-2148534685.jpg?c=...300.0 s46.9 KiB
/api/v1/images/stellar/prod/gettyimages-1993523294.jpg?c=...300.0 s45.2 KiB
/api/v1/images/stellar/prod/2026-04-16t014253z-1915766456...300.0 s44.7 KiB
/api/v1/images/stellar/prod/2x3-ai-generated-image-image-...300.0 s43.7 KiB
/api/v1/images/stellar/prod/ap20106690900844a.JPG?c=1x1&q...300.0 s42.6 KiB
/api/v1/images/stellar/prod/gettyimages-904695948-cropped...300.0 s38.9 KiB
/api/v1/images/stellar/prod/118866-childrensvillage-verti...300.0 s38.5 KiB
/api/v1/images/stellar/prod/gettyimages-1303676407.jpg?c=...300.0 s37.1 KiB
/media/sites/js/bundles/cnn-edition-adfuel-body-4f5702656...7200.0 s43.6 KiB
/api/v1/images/stellar/prod/118845-dronefloodingmichigan-...300.0 s34.1 KiB
registry.api.cnn.io/bundles/fave/4.33.0/css600.0 s34.4 KiB
/api/v1/images/stellar/prod/20260415-rose-perry.jpg?c=16x...300.0 s32.3 KiB
cdn.cxense.com/cx.js3600.0 s38.1 KiB
cdn.cxense.com/cx.js3600.0 s38.1 KiB
/api/v1/images/stellar/prod/118832-artemisviralhats-vt-th...300.0 s30.6 KiB
btloader.com/tag?o=5762268746743808&upapi=true300.0 s30.1 KiB
/api/v1/images/stellar/prod/farmtornado.jpg?c=9x16&q=h_48...300.0 s29.4 KiB
cdn.id5-sync.com/api/1.0/id5-api.js3600.0 s34.5 KiB
/api/v1/images/stellar/prod/118891-formergovaccused-vrtc-...300.0 s28.7 KiB
/api/v1/images/stellar/prod/25cr10273-ind-redacted-3.jpg?...300.0 s27.6 KiB
/api/v1/images/stellar/prod/ap26098146999528-202604102303...300.0 s26.8 KiB
/api/v1/images/stellar/prod/02-noah-wyle-supriya-ganesh-0...300.0 s26.7 KiB
cdn.boomtrain.com/p13n/cnn/p13n.min.js3600.0 s31.6 KiB
/api/v1/images/stellar/prod/118877-northkoreanuclearprogr...300.0 s25.9 KiB
/api/v1/images/stellar/prod/118874-jose-andres-war-impact...300.0 s25.8 KiB
/api/v1/images/stellar/prod/260416-hegseth-vrtc.jpg?c=9x1...300.0 s25.6 KiB
/api/v1/images/stellar/prod/trump-powell-thumb.jpg?c=9x16...300.0 s25.1 KiB
/api/v1/images/stellar/prod/118872-scott-bessent-gas-pric...300.0 s24.5 KiB
/api/v1/images/stellar/prod/118882-icefallsfromsky-vthumb...300.0 s24.5 KiB
/api/v1/images/stellar/prod/thumbnail-military-audio-bloc...300.0 s24.3 KiB
/api/v1/images/stellar/prod/118873-trumpdietsodacancercle...300.0 s24.3 KiB
/api/v1/images/stellar/prod/copy-118862-trumpmeloniclean....300.0 s24.3 KiB
media.cnn.com/api/v1/images/stellar/prod/npw-1.jpg?c=9x16&q=h_480,w_270,c_fill300.0 s23.9 KiB
/api/v1/images/stellar/prod/thumbnail-russia-drone-strike...300.0 s23.8 KiB
edition.cnn.com/media/sites/cnn/app-store-cnn-app-qr-code.png60.0 s22.9 KiB
/api/v1/images/stellar/prod/20260415-alito-thomas.jpg?c=1...300.0 s23.3 KiB
edition.cnn.com/media/sites/cnn/google-play-cnn-app-qr-code.png60.0 s22.3 KiB
/api/v1/images/stellar/prod/260415-ebof-thumbnails-clean....300.0 s22.0 KiB
/api/v1/images/stellar/prod/118879-chinairanliterature-vr...300.0 s21.9 KiB
/api/v1/images/stellar/prod/mystic-20260415224327355.jpg?...300.0 s21.8 KiB
/api/v1/images/stellar/prod/118878-rubyrosekatyperryassau...300.0 s21.1 KiB
/api/v1/images/stellar/prod/2025-07-24t211944z-216166992-...300.0 s20.7 KiB
/api/v1/images/stellar/prod/2026-04-11t101137z-1997856410...300.0 s20.2 KiB
secure.cdn.fastclick.net/js/pubcid/latest/pubcid.min.js900.0 s21.7 KiB
/api/v1/images/stellar/prod/118871-trumptaxreturns-thumb....300.0 s20.1 KiB
/api/v1/images/stellar/prod/118865-nicrobertsonpakistan-t...300.0 s20.0 KiB
static.criteo.net/js/ld/publishertag.js86400.0 s47.6 KiB
/api/v1/images/stellar/prod/c-air-new-zealand-economy-sky...300.0 s19.8 KiB
/api/v1/images/stellar/prod/pope-leo-tyrant-cameroon-vrtc...300.0 s19.5 KiB
/api/v1/images/stellar/prod/gettyimages-2271048987.jpg?c=...300.0 s16.6 KiB
/api/v1/images/stellar/prod/gettyimages-2257402331.jpg?c=...300.0 s16.2 KiB
/api/v1/images/stellar/prod/01b-alfie-whiteman-untitled-f...300.0 s15.3 KiB
/launch/7be62238e4c3/97fa00444124/b278aa9dd3f4/EX33692741...0.0 ms14.4 KiB
/api/v1/images/stellar/prod/gettyimages-2270389368.jpg?c=...300.0 s14.2 KiB
/api/v1/images/stellar/prod/c-gettyimages-1322256607-2026...300.0 s11.6 KiB
static.chartbeat.com/js/chartbeat_video.js86400.0 s24.8 KiB
/jload?anId=925660&campId=1x1&pubId=38600317&chanId=90974...604800.0 s92.0 KiB
/launch/7be62238e4c3/97fa00444124/b278aa9dd3f4/RC5f713f27...0.0 ms8.0 KiB
/publisher/925660/ebfdc39c-b42a-11f0-aa09-0e6958f30139.mi...0.0 ms6.9 KiB
cdn.ml314.com/taglw.js3600.0 s8.4 KiB
registry.api.cnn.io/bundles/fave/4.33.0/app600.0 s7.2 KiB
edition.cnn.com/wbdotp/scripttemplates/otSDKStub.js7200.0 s8.8 KiB
/launch/7be62238e4c3/97fa00444124/b278aa9dd3f4/RC0394f581...0.0 ms6.2 KiB
eus.rubiconproject.com/usync.js40254.0 s11.5 KiB
static.criteo.net/js/ld/publishertag.ids.js86400.0 s14.8 KiB
cdn.cxense.com/cx.cce.js3600.0 s6.8 KiB
z.cdp-dev.cnn.com/zfm/zfh-3.js0.0 ms5.0 KiB
assets.bounceexchange.com/cache/7291/website-ad301b574258105d67ce15116c0f852e.js120.0 s5.1 KiB
/jsconfig/jload/925660?cbName=__IntegralAS__7626&anId=925...0.0 ms4.5 KiB
/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da177152312...86400.0 s10.7 KiB
static.chartbeat.com/js/chartbeat_mab.js86400.0 s10.1 KiB
tag.wknd.ai/7291/i.js60.0 s3.5 KiB
rules.quantcount.com/rules-p-D1yc5zQgjmqr5.js3600.0 s4.2 KiB
sb.scorecardresearch.com/internal-cs/default/beacon-and.js86400.0 s7.8 KiB
/wbdotp/consent/3d9a6f21-8e47-43f8-8d58-d86150f3e92b/0199...7200.0 s4.2 KiB
invstatic101.creativecdn.com/encrypted-signals/encrypted-tag-g.js0.0 ms2.9 KiB
/wbdotp/consent/3d9a6f21-8e47-43f8-8d58-d86150f3e92b/0199...7200.0 s2.5 KiB
www.i.cdn.cnn.com/zion/zion-mb.min.js0.0 ms1.8 KiB
/launch/7be62238e4c3/97fa00444124/b278aa9dd3f4/RC4bdaf299...0.0 ms1.8 KiB
edition.cnn.com/media/sites/cnn/video-placeholder.svg60.0 s1.7 KiB
experience.piano.io/xbuilder/experience/load?aid=RCoM2QBLpu1800.0 s1.9 KiB
edition.cnn.com/media/sites/cnn/icons/video-dark.svg60.0 s1.4 KiB
edition.cnn.com/media/sites/cnn/icons/video.svg60.0 s1.4 KiB
edition.cnn.com/media/sites/cnn/icons/ui-search.svg60.0 s1.3 KiB
/sync?c=16b6410431b6374e780104abb0443ca8&p=34747f0775f02a...0.0 ms1.3 KiB
edition.cnn.com/media/sites/cnn/icons/ui-speech-bubble.svg60.0 s1.3 KiB
/launch/7be62238e4c3/97fa00444124/b278aa9dd3f4/RC0f55d142...0.0 ms1.1 KiB
id5-sync.com/c/963/0/8/1.gif?gdpr=0&gdpr_consent=&us_privacy=0.0 ms1.0 KiB
/state/js?website_id=7291&device_id=7250246292756127435&v...0.0 ms1003 B
config.aps.amazon-adsystem.com/configs/32883600.0 s1.2 KiB
config.aps.amazon-adsystem.com/configs/e5a6f2d1-7642-4cc5-a917-96dbe8c3ed8f3600.0 s809 B
segment-data.zqtk.net/turner-47fcf6?url=https%3A%2F%2Fedition.cnn.com%2F301.0 s604 B
registry.api.cnn.io/bundles/fave/4.33.0/vendorHashes600.0 s518 B
/Repo/rep.gif?ver=3.3.0&typ=pgv&rnd=mo1qix217wa7984k&sid=...0.0 ms413 B
cdn3.optimizely.com/js/geo4.js0.0 ms324 B
/track/cmb/generic?ttd_pid=u40cpuw&ttd_tpi=1&gdpr=0&gdpr_...0.0 ms254 B
creativecdn.com/cm-notify?pi=uk-ozone-pbs&gdpr=0&gdpr_consent=&us_privacy=&tc=10.0 ms124 B
cdn.indexww.com/ht/htw-pixel.gif?086400.0 s223 B
eus.rubiconproject.com/usync.js40254.0 s0 B
cdn.indexww.com/ht/htw-pixel.gif?086400.0 s0 B

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]
items: [map[node:map[type:text value:Total] score:0.005311] map[node:map[boundingRect:map[bottom:802 height:175 left:16 right:396 top:627 width:380] lhId:page-16-A nodeLabel:BREAKING NEWS Trump announces 10-day Israel-Lebanon ceasefire A pause in hostil… path:1,HTML,1,BODY,15,DIV,3,SECTION,0,SECTION,0,DIV,0,SECTION,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,1,DIV,0,DIV,2,DIV,0,DIV,0,DIV,0,DIV,1,A selector:div.container__field-wrapper > div.container__field-links > div.card > a.container__link snippet:<a href="/2026/04/16/world/live-news/iran-war-trump-us-israel" class="container__link container__link--type-live-story container_spotlight-packa…" data-link-type="live-story" data-zjs="click" data-zjs-cms_id="cms.cnn.com/_pages/clg35eiid000047ph29wz3tv3@published" data-zjs-canonical_url="https://www.cnn.com" data-zjs-zone_id="cms.cnn.com/_components/zone/instances/clg35ekvl000f47phde9l5nd7@published" data-zjs-zone_name="zone" data-zjs-zone_type="zone_layout--full-width" data-zjs-zone_position_number="1" data-zjs-zone_total_number="2" data-zjs-stack_id="cms.cnn.com/_components/stack/instances/clg35ekvl000q47ph8tbz76e5@published" …> type:node] score:0.005311]]
headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]
items: [map[node:map[type:text value:Total] score:0.140685] map[node:map[boundingRect:map[bottom:16183 height:15963 left:0 right:412 top:220 width:412] lhId:page-17-DIV nodeLabel:BREAKING NEWS Trump announces 10-day Israel-Lebanon ceasefire A pause in hostil… path:1,HTML,1,BODY,15,DIV selector:body.layout > div.layout__content-wrapper snippet:<div class="layout__content-wrapper layout-homepage-mobile__content-wrapper"> type:node] score:0.140685]]

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLEst Savings
edition.cnn.com/fonts/cnn/cnn_sans_display-v1.woff270 ms
edition.cnn.com/fonts/cnn/noto_serif-v1.woff240 ms
edition.cnn.com/fonts/cnn/cnn_sans_display-bold-v1.woff230 ms
edition.cnn.com/fonts/cnn/cnn_sans_display-medium-v1.woff220 ms
/api/fonts/710d89e5/3bc5691b27e2095177acd363ced8df1cade98...5.0 ms

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:138.345 source:map[column:822 line:20 type:source-location url: urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:35.676 source:map[type:text value:[unattributed]]] map[reflowTime:25.968 source:map[column:19312 line:51 type:source-location url: urlProvider:network]] map[reflowTime:0.166 source:map[column:45016 line:5 type:source-location url:https://cdn.cxense.com/cx.js urlProvider:network]] map[reflowTime:112.377 source:map[column:11886 line:6 type:source-location url: urlProvider:network]] map[reflowTime:0.119 source:map[column:1003 line:43 type:source-location url: urlProvider:network]] map[reflowTime:0.159 source:map[column:150104 line:0 type:source-location url:https://pixel.adsafeprotected.com/jload?anId=925660&campId=1x1&pubId=38600317&chanId=90974437&placementId=7266043376&pubCreative=138550710882&pubOrder=4025287825&cb=1186005289&adsafe_par&impId=1d593607-39b7-11f1-bb52-8a19658a0faa&custom=bnr_atf_01&custom2=&custom3=&custom4=&custom5=stlr&custom6=landing_homepage&ias_adpath=%23ad_bnr_atf_01 urlProvider:network]]]

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
CNN_Headlines_International_Placeholder_Generic.png div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/cnn-headlines-international-p...1.1 MiB1.1 MiB
People gather around a destroyed Palestinian police jeep that was targeted by a… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/gettyimages-2267440730.jpg?c=...138.5 KiB125.2 KiB
While Italy remains a popular destination for tourists, the country is cracking… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/gettyimages-2269936762.jpg?c=...115.8 KiB102.5 KiB
Circa 1600, English dramatist and poet William Shakespeare (1564 - 1616) ponder… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/gettyimages-51246880.jpg?c=16...112.8 KiB99.6 KiB
The life jacket is the first from a survivor of the Titanic to ever come up for… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/310.jpg?c=16x9&q=h_540,w_960,...109.3 KiB96.1 KiB
A residential building damaged during Russian drone strike, amid Russia's attac… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/2026-04-16t065631z-253594607-...103.9 KiB90.6 KiB
A crane being used to construct the new White House ballroom is seen next to th… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/ap26095642336676.jpg?c=16x9&q...93.7 KiB80.5 KiB
Artist Alberto Burri poured tons of cement over the ruins of Gibellina in Sicil… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/sipa-01219076-000049.jpg?c=16...83.7 KiB70.6 KiB
div#celtra-object-24534 > div#celtra-object-24535 > div#celtra-object-24537 > img div#celtra-object-24534 > div#celtra-object-24535 > div#celtra-object-24537 > img
/api/blobs/b8c5e0680ffec3ef614530fa0c4da2789017b1a30b8a11...96.7 KiB65.9 KiB
Meghan, the Duchess of Sussex, meets young advocates during a visit to Batyr, a… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/2026-04-16t014253z-1915766456...44.1 KiB37.2 KiB
This AI-generated fake image shared by President Donald Trump to the social med… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/2x3-ai-generated-image-image-...43.3 KiB36.5 KiB
Then-Lt. Gov. Justin Fairfax and his wife, Cerina, attend his and Gov. Ralph No… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/gettyimages-904695948-cropped...38.3 KiB32.3 KiB
Ruby Rose and Katy Perry div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/20260415-rose-perry.jpg?c=16x...31.8 KiB26.8 KiB
118866_ChildrensVillage_Vertical_1.00_00_13_10.Still001.jpg div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/118866-childrensvillage-verti...38.0 KiB16.9 KiB
FARMTORNADO.jpg div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/farmtornado.jpg?c=9x16&q=h_48...28.8 KiB7.7 KiB
118891_FormerGovAccused_vrtc_clean.00_01_46_15.Still002.jpg div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/118891-formergovaccused-vrtc-...28.2 KiB7.1 KiB

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

More than 4 preconnect connections were found. These should be used sparingly and only to the most important origins.
description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.6 s
URLTime Spent
cnn.com/798 ms
www.cnn.com/811 ms
edition.cnn.com/0.0 ms

These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS

Why this matters

Performance issues directly impact user engagement and conversion rates.

ElementLayout shift score
BREAKING NEWS Trump announces 10-day Israel-Lebanon ceasefire A pause in hostil… body.layout > div.layout__content-wrapper
0.141
BREAKING NEWS Trump announces 10-day Israel-Lebanon ceasefire A pause in hostil… div.container__field-wrapper > div.container__field-links > div.card > a.container__link
0.005

Diagnostics

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 2.3 s 1.8 MiB
URLTransfer SizeEst Savings
registry.api.cnn.io/bundles/fave/boltPlayer-928190fd/boltPlayer624.3 KiB416.3 KiB
registry.api.cnn.io/bundles/fave/ui-31f91f80/ui2.3 MiB267.6 KiB
registry.api.cnn.io/bundles/fave/vendor-a5827f1f/vendor329.0 KiB232.1 KiB
edition.cnn.com/184.7 KiB121.8 KiB
/pagead/managed/js/gpt/m202604130101/pubads_impl.js187.5 KiB94.6 KiB
z.cdp-dev.cnn.com/zion-web-client/3.0/zion-web-client.min.js268.7 KiB89.6 KiB
/media/sites/js/bundles/cnn-edition-adfuel-e30d4ed1f85bf5...215.1 KiB89.4 KiB
cdn.tinypass.com/api/tinypass.min.js131.8 KiB82.2 KiB
edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otBannerSdk.js110.0 KiB63.9 KiB
/assets/smart-tag/versioned/main-v2_a8ec0b4e51efd1e1ddbdf...116.2 KiB60.7 KiB
registry.api.cnn.io/bundles/fave/latest-4.x/js116.1 KiB44.6 KiB
cdn.optimizely.com/public/125375509/s/landingprod.js122.0 KiB41.7 KiB
c.amazon-adsystem.com/aax2/apstag.js90.4 KiB40.4 KiB
registry.api.cnn.io/bundles/fave/boltInstance-ea4aefab/boltInstance75.1 KiB39.3 KiB
/jload?anId=925660&campId=1x1&pubId=38600317&chanId=90974...91.8 KiB36.2 KiB
client.aps.amazon-adsystem.com/publisher.js82.1 KiB34.1 KiB
/pagead/managed/js/activeview/current/ufs_web_display.js73.1 KiB30.4 KiB
static.criteo.net/js/ld/publishertag.js47.3 KiB29.9 KiB
cdn.cxense.com/cx.js37.5 KiB21.8 KiB
/assets/smart-tag/versioned/ads-v2_fdaa8d77359124608f52c1...41.5 KiB21.1 KiB
about:srcdoc71.9 KiB20.8 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTotal CPU TimeScript EvaluationScript Parse
edition.cnn.com/124.9 s14.4 s451 ms
Unattributable5.9 s582 ms0.0 ms
cdn.cxense.com/cx.js3.6 s856 ms16 ms
/6adbc4e9-beda-4b9e-9117-43ec3a80e1d0-web.js2.9 s1.4 s114 ms
/ads/c54c6c18/web.js?&accountId=1635c534&clickUrl=https%3...2.7 s2.2 s269 ms
cdn.optimizely.com/public/125375509/s/landingprod.js2.5 s1.8 s76 ms
cadmus.script.ac/d2uap9jskdzp2/script.js2.2 s1.8 s111 ms
/pagead/managed/js/gpt/m202604130101/pubads_impl.js2.0 s1.7 s81 ms
registry.api.cnn.io/bundles/fave/boltPlayer-928190fd/boltPlayer1.7 s1.2 s375 ms
registry.api.cnn.io/bundles/fave/vendor-a5827f1f/vendor1.5 s388 ms168 ms
/jsconfig/jload/925660?cbName=__IntegralAS__7626&anId=925...1.3 s1.2 s1.0 ms
/media/sites/js/bundles/cnn-edition-adfuel-body-4f5702656...1.0 s981 ms31 ms
/media/sites/js/bundles/cnn-edition-adfuel-e30d4ed1f85bf5...950 ms828 ms115 ms
cdn.tinypass.com/api/tinypass.min.js936 ms735 ms57 ms
/cache/7291/campaigns/2601531-0c875936fd6a509b9445fb7d9a5...846 ms770 ms8.5 ms
registry.api.cnn.io/bundles/fave/boltInstance-ea4aefab/boltInstance817 ms714 ms50 ms
lightning.cnn.com/launch/7be62238e4c3/97fa00444124/launch-2878c87af5e3.min.js674 ms499 ms140 ms
registry.api.cnn.io/bundles/fave/ui-31f91f80/ui614 ms152 ms461 ms
registry.api.cnn.io/bundles/fave/latest-4.x/js375 ms310 ms47 ms
client.aps.amazon-adsystem.com/publisher.js345 ms275 ms59 ms
/pagead/managed/js/activeview/current/ufs_web_display.js338 ms288 ms32 ms
/state/js?website_id=7291&device_id=7250246292756127435&v...301 ms253 ms0.5 ms
edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otBannerSdk.js298 ms215 ms69 ms
z.cdp-dev.cnn.com/zion-web-client/3.0/zion-web-client.min.js288 ms198 ms40 ms
/assets/smart-tag/versioned/main-v2_a8ec0b4e51efd1e1ddbdf...287 ms198 ms78 ms
static.chartbeat.com/js/chartbeat_video.js281 ms184 ms20 ms
btloader.com/tag?o=5762268746743808&upapi=true244 ms197 ms13 ms
c.amazon-adsystem.com/aax2/apstag.js233 ms174 ms47 ms
z.cdp-dev.cnn.com/zfm/zfh-3.js232 ms139 ms1.5 ms
/assets/smart-tag/versioned/ads-v2_fdaa8d77359124608f52c1...180 ms154 ms23 ms
/assets/smart-tag/versioned/cjs_min_92abedfd1b9757a428bfc...164 ms131 ms6.5 ms
/api/creatives/c54c6c18/compiled/web.js?v=3-a3e6d21c&secu...139 ms1.4 ms137 ms
static.criteo.net/js/ld/publishertag.js136 ms103 ms17 ms
securepubads.g.doubleclick.net/tag/js/gpt.js129 ms108 ms20 ms
/jload?anId=925660&campId=1x1&pubId=38600317&chanId=90974...129 ms83 ms43 ms
assets.bounceexchange.com/assets/bounce/jquery-3.7.1.min.js117 ms90 ms24 ms
cdn.boomtrain.com/p13n/cnn/p13n.min.js115 ms92 ms13 ms
/public/user/id?json=%7B%22identities%22%3A%5B%7B%22type%...113 ms105 ms0.5 ms
static.chartbeat.com/js/chartbeat_mab.js84 ms75 ms3.5 ms
secure.cdn.fastclick.net/js/pubcid/latest/pubcid.min.js67 ms56 ms11 ms
registry.api.cnn.io/bundles/fave/4.33.0/app65 ms60 ms3.6 ms
static.criteo.net/js/ld/publishertag.ids.js57 ms50 ms6.4 ms
sb.scorecardresearch.com/cs/6035748/beacon.js52 ms45 ms3.3 ms
/sync?c=16b6410431b6374e780104abb0443ca8&p=34747f0775f02a...51 ms48 ms1.6 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Other79.7 s
Script Evaluation36.4 s
Style & Layout32.9 s
Rendering8.5 s
Script Parsing & Compilation3.3 s
Parse HTML & CSS1.1 s
Garbage Collection604 ms

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure type
The page has an unload handler in the main frame.Actionable
The page has an unload handler in a sub frame.Actionable

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 145.2 KiB
URLTransfer SizeEst Savings
@font-face { font-family: "cnn_sans_condensed"; font-weight: 700; … } …146.6 KiB123.1 KiB
22.4 KiB22.1 KiB

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
/api/v1/loops/stellar/prod/118033-visit-canberra-loop.mp4...7.6 MiB
/api/v1/loops/stellar/prod/118733-dana-national-zoo-baby-...2.6 MiB
registry.api.cnn.io/bundles/fave/ui-31f91f80/ui2.3 MiB
/api/v1/loops/stellar/prod/flooding-in-wisconsinloop-hori...1.9 MiB
/api/v1/images/stellar/prod/cnn-headlines-international-p...1.1 MiB
registry.api.cnn.io/bundles/fave/boltPlayer-928190fd/boltPlayer624.8 KiB
edition.cnn.com/500.0 KiB
registry.api.cnn.io/bundles/fave/vendor-a5827f1f/vendor339.5 KiB
z.cdp-dev.cnn.com/zion-web-client/3.0/zion-web-client.min.js269.4 KiB
/api/v1/images/stellar/prod/118867-ahmedeldin-vrtc-thumb-...226.9 KiB

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Optimize DOM size
●LCP breakdown
●Modern HTTP
●Render blocking requests
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●User Timing marks and measures 227 user timings
●Avoid long main-thread tasks 20 long tasks found
●Image elements have explicit `width` and `height`
●Network Requests
●Network Round Trip Times 250 ms
●Server Backend Latencies 330 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 10 ms
○INP breakdown
○LCP request discovery
○Avoid non-composited animations
93

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Names and labels

Screen reader users rely on frame titles to describe the contents of frames. Learn more about frame titles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div#google_ads_iframe_/8663477/CNNi/homepage/landing_0__container__ > div.celtra-ad-inline-host > div.notranslate > iframe div#google_ads_iframe_/8663477/CNNi/homepage/landing_0__container__ > div.celtra-ad-inline-host > div.notranslate > iframe

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.zone > div.zone__inner > div.zone__kicker > a.zone__kicker-url div.zone > div.zone__inner > div.zone__kicker > a.zone__kicker-url
div.container__field-wrapper > div.container__field-links > div.card > a.container__link div.container__field-wrapper > div.container__field-links > div.card > a.container__link
div.container__field-wrapper > ul.container__field-links > li.card > a.container__link div.container__field-wrapper > ul.container__field-links > li.card > a.container__link

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Sign in div#mobile-footer-account-nav > nav.user-account-nav > div.user-account-nav__icons > button.user-account-nav__text-button
Listen div.layout__bottom > footer#pageFooter > div.footer__inner > a.footer__audio-link
Watch div.layout__bottom > footer#pageFooter > div.footer__inner > a.footer__video-link
○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●`[role]` values are valid
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Buttons have an accessible name
●Image elements have `[alt]` attributes
●Form elements have associated labels
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●ARIA attributes are used as specified for the element's role
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●Background and foreground colors have a sufficient contrast ratio
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●No element has a `[tabindex]` value greater than 0
●Touch targets have sufficient size and spacing.
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●`<video>` elements contain a `<track>` element with `[kind="captions"]`
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
○`[role]`s are contained by their required parent element
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○The page contains a heading, skip link, or landmark region
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○ARIA IDs are unique
○No form fields have multiple labels
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○Links are distinguishable without relying on color.
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Skip links are focusable.
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Uses ARIA roles only on compatible elements
○Image elements do not have `[alt]` attributes that are redundant text.
○Identical links have the same purpose.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
77

Best Practices

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / WarningSource
Specifying overflow: visible on img, video and canvas tags may cause them to produce visual content outside of the element bounds. See https://github.com/WICG/shared-element-transitions/blob/main/debugging_overflow_on_images.md.
edition.cnn.com/ line 8183, col -1
Topics
/media/sites/js/bundles/cnn-edition-adfuel-e30d4ed1f85bf5...
SharedStorage
/pagead/managed/js/activeview/current/ufs_web_display.js line 252, col 234
Unload event listeners are deprecated and will be removed.
cadmus.script.ac/d2uap9jskdzp2/script.js

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
edition.cnn.com/
Access to XMLHttpRequest at 'https://hbopenbid.pubmatic.com/translator?' from origin 'https://edition.cnn.com' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
edition.cnn.com/
Attestation check for Protected Audience on https://a.teads.tv failed.
edition.cnn.com/
Attestation check for Protected Audience on https://direct.adsrvr.org failed.
edition.cnn.com/
Attestation check for Protected Audience on https://elb.the-ozone-project.com failed.
edition.cnn.com/
Attestation check for Protected Audience on https://fastlane.rubiconproject.com failed.
edition.cnn.com/
Attestation check for Protected Audience on https://grid-bidder.criteo.com failed.
edition.cnn.com/
Attestation check for Protected Audience on https://hbopenbid.pubmatic.com failed.
edition.cnn.com/
Attestation check for Protected Audience on https://htlb.casalemedia.com failed.
edition.cnn.com/
Attestation check for Protected Audience on https://ib.adnxs.com failed.
hbopenbid.pubmatic.com/translator?
Failed to load resource: net::ERR_FAILED

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLMap URL
edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otBannerSdk.js
/media/sites/js/bundles/cnn-edition-adfuel-e30d4ed1f85bf5...edition.cnn.com/media/sites/js/bundles/cnn-edition-adfuel.map
edition.cnn.com/
/media/sites/js/bundles/cnn-edition-adfuel-body-4f5702656...edition.cnn.com/media/sites/js/bundles/cnn-edition-adfuel-body.map
cdn.cxense.com/cx.cce.jscdn.cxense.com/cx.cce.js.map
/publisher/925660/ebfdc39c-b42a-11f0-aa09-0e6958f30139.mi...static.adsafeprotected.com/publisher/925660/main.min.js.map
●Uses HTTPS
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Displays images with correct aspect ratio
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
85

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

Crawling and Indexing

If your robots.txt file is malformed, crawlers may not be able to understand how you want your website to be crawled or indexed. Learn more about robots.txt.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Line #ContentError
1Unknown ErrorSyntax not understood

To appear in search results, crawlers need access to your app.

Content Best Practices

Canonical links suggest which URL to show in search results. Learn more about canonical links.

Why this matters

Informational: a Permissions-Policy directive showing feature -> allowed origins.

Source: MDN Permissions-Policy

Format your HTML in a way that enables crawlers to better understand your app’s content.

○Structured data is valid
●Page isn’t blocked from indexing
●Document has a `<title>` element
●Document has a meta description
●Page has successful HTTP status code
●Links have descriptive text
●Links are crawlable
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`

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